ISO 17721-1:2021

Quantitative determination of antibacterial activity of ceramic tile surfaces — Test methods — Part 1: Ceramic tile surfaces with incorporated antibacterial agents

 

1   Scope

This document specifies test methods for evaluating the antibacterial activity of glazed and unglazed ceramic tile surfaces with incorporated antibacterial agents.

Secondary effects on ceramic tile surfaces due to antibacterial treatments, such as changes in chemical resistance, stain resistance or small colour differences, are not covered by this document. For chemical resistance refer to ISO 10545-13, for stain resistance refer to ISO 10545-14 and for colour differences refer to ISO 10545-16.

Any results obtained with this document will always refer to this document and the conditions used. Results obtained with this document indicate antibacterial activity under the specified experimental conditions used herein, and do not reflect activity under other circumstances where a variety of factors, such as temperature, humidity, different bacterial species, nutrient conditions, etc., are considered.

 

2   Normative references

There are no normative references in this document.

 

3   Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp

— IEC Electropedia: available at http://www.electropedia.org/

3.1

antibacterial

condition where growth of bacteria on the surfaces of product is suppressed or describing the effect of an agent which suppresses the growth of bacteria on the surface of products

3.2

antibacterial agent

agent that kills or inhibits growth of bacteria on the surfaces of products by the use of an antibacterial (3.1) surface treatment or a compounded agent

3.3

antibacterial activity

difference in the logarithm of the viable cell count found on an antibacterial-treated product and an untreated control after inoculation with and incubation of bacteria